There are several synonyms for the word "impinger." Some of the most commonly used synonyms for this word include impactor, aerosol collector, and particulate sampler. An impactor is a device used to sample and collect particles from the air, while an aerosol collector is a specialized tool that is used to collect aerosol particles from the atmosphere. A particulate sampler, on the other hand, is a device used to collect and measure particles that are present in liquids or gases. These synonyms can be useful when discussing environmental monitoring, health and safety, or other fields where air or liquid quality is a concern.